arm64: use L() in the handful of places we didn't already.

Change-Id: Ieb3cc5c9623291421c1d2fdc204e27812fee8ffd
diff --git a/libc/arch-arm64/bionic/__bionic_clone.S b/libc/arch-arm64/bionic/__bionic_clone.S
index e9932ad..581b47a 100644
--- a/libc/arch-arm64/bionic/__bionic_clone.S
+++ b/libc/arch-arm64/bionic/__bionic_clone.S
@@ -39,7 +39,7 @@
     svc     #0
 
     # Are we the child?
-    cbz     x0, .L_bc_child
+    cbz     x0, L(child)
 
     # Set errno if something went wrong.
     cmn     x0, #(MAX_ERRNO + 1)
@@ -48,7 +48,7 @@
 
     ret
 
-.L_bc_child:
+L(child):
     # We're in the child now. Set the end of the frame record chain.
     mov     x29, #0
     # Setting x30 to 0 will make the unwinder stop at __start_thread.
diff --git a/libc/arch-arm64/bionic/vfork.S b/libc/arch-arm64/bionic/vfork.S
index dd16349..26ac255 100644
--- a/libc/arch-arm64/bionic/vfork.S
+++ b/libc/arch-arm64/bionic/vfork.S
@@ -72,7 +72,7 @@
     mov     x8, __NR_clone
     svc     #0
 
-    cbz     x0, .L_exit
+    cbz     x0, L(done)
 
     // rc != 0: reset cached_pid_ and vforked_.
     str     w10, [x9, #20]
@@ -80,7 +80,7 @@
     cneg    x0, x0, hi
     b.hi    __set_errno_internal
 
-.L_exit:
+L(done):
     ret
 END(vfork)